Meiosis

Learn.

What is meiosis? | Facts | yourgenome.org
Diagram of meiosis from your genome

Interphase is not apart of meiosis or mitosis and it occurs to prepare the cell for division. The cell prepares through growing, replicating it’s DNA and preparing to divide.

Prophase is the first step in meiosis, DNA has been replicated so it pairs up at the centromere. Additionally, the chromatin in the cell is condensed and the nucleolus disappears.

Metaphase is when the chromosomes are lined up at the equator of the cell, the genetic information is at its second most condensed stage.

Anaphase involves the pulling apart of the chromosomes into sister chromatids by the spindle fibres which are protrusion from the centriol which are found at both ends of the cell. The daughter chromatids are therefore transported to opposite poles of the cell.

Telophase is the final stage in mitosis and it involves the uncoiling of chromosomes to form chromatin. Hence preparing the genetic material to direct metabolic activities for the new cells. Additionally, the spindle breaks down, and new nuclear envelopes envelop the DNA.

Additionally, cytokinesis occurs which involves the cell membrane being pinched inwards for the cell hence forming to new cells.

Meiosis differs in that the aboves processes Prophase, metaphase, anaphase, telephase and cytokenesis occurs twice. Therefore, 4 haploid cells form from 1 diploid cell. These haploid cells contain half the amount of DNA as the parent cell. These form gametes (sperm cells and egg cells), which can later combine and form a diploid cell which will replicate through mitosis to form a new organism.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: